Is APTT 27.1 normal, high or low? What does APTT level 27.1 mean?

📅 Medical Review Date: March 3, 2026

Your APTT level of 27.1 is a Normal APTT level.

Normal APTT levels may indicate underlying health problems. The normal range is typically between 22 seconds and 35 seconds. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal APTT range for men is :22 - 35 seconds

Ideal values of APTT depending on age (male) :

Age	Ideal APTT value
<5 years	22.596
5-10 years	23.208
10-15 years	23.837
15-20 years	24.483
20-25 years	25.146
25-30 years	25.827
30-35 years	26.527
35-40 years	27.246
40-45 years	27.984
45-50 years	28.742
50-55 years	29.521
55-60 years	30.321
60-70 years	31.143
70-80 years	31.987
80-90 years	32.854
90-100 years	33.744
>100 years	34.658

*Ideal values are calculated based on our database of patient records

Get Advice via Email : Send us your blood test report, and our APTT experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides APTT, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

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Some examples of conditions that increase or decrease APTT levels include:

• Liver disease
• Vitamin K abnormality
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Hemophilia A and hemophilia B
• Willebrand disease

Receive world-class medical opinion about your normal APTT levels over email.Upload blood test report now

Normal range of APTT found among women :22-35 seconds

Ideal values of APTT depending on age (female) :

Age	Ideal APTT value
<5 years	22.614
5-10 years	23.245
10-15 years	23.894
15-20 years	24.561
20-25 years	25.247
25-30 years	25.952
30-35 years	26.676
35-40 years	27.421
40-45 years	28.186
45-50 years	28.973
50-55 years	29.782
55-60 years	30.613
60-70 years	31.468
70-80 years	32.346
80-90 years	33.249
90-100 years	34.177
>100 years	34.15

If you take a APTT blood test and the results are not in the normal range (22-35 seconds), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the APTT Test Is Done :

When your doctor orders a APTT test, it involves a straightforward blood draw to measure your APTT levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your APTT test results are usually available within a few hours.

Medical References

• WebMD – Activated Partial Thromboplastin Time (APTT) Test
• Cleveland Clinic – Partial Thromboplastin Time (PTT) Test
• NIH – Solutions to Establishing and Verifying Normal Reference Intervals and Assessing APTT Reagents